McDonald’s has announced a nationwide recall of Hello Kitty lollipop whistles the restaurant chain has been distributing since October due to fears of choking among young children, Bloomberg reported on Tuesday, November 11.

The company received two reports of children who coughed out pieces of the defective toy, one of whom had to receive medical attention because of the incident. According to the report, small parts of the defective toy can detach, putting the kids at risk for aspiration and choking. The toys, which were manufactured in China, came free with every Happy Meals and Mighty Kids Meal.

1.6 million of the approximately 2.3 million Hello Kitty toys have already been recovered by the restaurant chain, McDonald’s said in a statement.

This is not the first time that a McDonald’s product has caused concerns among government officials and the public. As recently as 2010, the fast food chain had to issue a recall of “Shrek” glasses that were sold in their restaurants, as these glasses contained cadmium.